| 圆形冷弯空心型钢重量 
 
 标准:GB/T 6728-2017 结构用冷弯空心型钢 
 
 | 外径D | 允许偏差 | 壁厚t | 截面面积 | 理论重量 |  | 外径D | 允许偏差 | 壁厚t | 截面面积 | 理论重 |  | mm | mm | mm | cm2 | (kg/m) | mm | mm | mm | A/cm2 | (kg/m) |  | 21.3 
 
 (21.3) 
 | ±0.5 | 1.2 | 0.76 | 0.59 |    114 
 
 (114.3) 
 | ±1.15 | 4 | 13.82 | 10.85 |  | 1.5 | 0.93 | 0.73 | 5 | 17.12 | 13.44 |  | 1.75 | 1.07 | 0.84 | 6 | 20.36 | 15.98 |  | 2 | 1.21 | 0.95 | 140 
 
 (139.7) 
 | ±1.40 | 4 | 17.09 | 13.42 |  | 2.5 | 1.48 | 1.16 | 5 | 21.21 | 16.65 |  | 3 | 1.72 | 1.35 | 6 | 25.26 | 19.83 |  | 1.2 | 0.97 | 0.76 | 165 
 
 (168.3) 
 | ±1.65 | 4 | 20.23 | 15.88 |  | 1.5 | 1.19 | 0.94 | 5 | 25.13 | 19.73 |  | 26.8 
 
 (26.9) 
 | ±0.5 | 1.75 | 1.38 | 1.08 | 6 | 29.97 | 23.53 |  | 2 | 1.56 | 1.22 | 8 | 39.46 | 30.97 |  | 2.5 | 1.91 | 1.5 | 219.1 
 
 ( 219.1) 
 | ±2.20 | 5 | 33.6 | 26.40 |  | 3 | 2.24 | 1.76 | 6 | 40.17 | 31.53 |  | 33.5 
 
 (33.7) 
 | ±0.5 | 1.5 | 1.51 | 1.18 | 8 | 53.10 | 41.6 |  | 2 | 1.98 | 1.55 | 10 | 65.70 | 51.6 |  | 2.5 | 2.43 | 1.91 | 273 
 
 (273) 
 | ±2.75 | 5 | 42.1 | 33.0 |  | 3 | 2.87 | 2.26 | 6 | 50.3 | 39.5 |  | 3.5 | 3.29 | 2.59 | 8 | 66.6 | 52.3 |  | 4 | 3.71 | 2.91 | 10 | 82.6 | 64.9 |  | 42.3 
 
 (42.4) 
 | ±0.5 | 1.5 | 1.92 | 1.51 | 325 
 
 (323.9) 
 | ±3.25 | 5 | 50.3 | 39.5 |  | 2 | 2.53 | 1.99 | 6 | 60.1 | 47.2 |  | 2.5 | 3.13 | 2.45 | 8 | 79.7 | 62.5 |  | 3 | 3.7 | 2.91 | 10 | 99.0 | 77.7 |  | 4 | 4.81 | 3.78 | 12 | 118.0 | 92.6 |  |   48 
 
 (48.3) 
 | ±0.5 | 1.5 | 2.19 | 1.72 | 355.6 
 
 (355.6) 
 | ±3.55 | 6 | 65.9 | 51.7 |  | 2 | 2.89 | 2.27 | 8 | 87.4 | 68.6 |  | 2.5 | 3.57 | 2.81 | 10 | 109.0 | 85.2 |  | 3 | 4.24 | 3.33 | 12 | 130.0 | 101.7 |  | 4 | 5.53 | 4.34 | 406.4 
 
 (406.4) 
 | ±4.10 | 8 | 100 | 78.6 |  | 5 | 6.75 | 5.3 | 10 | 125 | 97.8 |  |   60 
 
 (60.3) 
 | ±0.6 | 2 | 3.64 | 2.86 | 12 | 149 | 116.7 |  | 2.5 | 4.52 | 3.55 | 457 
 
 (457) 
 | ±4.6 | 8 | 113 | 88.6 |  | 3 | 5.37 | 4.22 | 10 | 140 | 110 |  | 4 | 7.04 | 5.52 | 12 | 168 | 131.7 |  | 5 | 8.64 | 6.78 | 508 
 
 (508) 
 | ±5.10 | 8 | 126 | 98.6 |  | 75.5 
 
 (76.1) 
 | ±0.76 | 2.5 | 5*73 | 4.5 | 10 | 156 | 123 |  | 3 | 6.83 | 5.36 | 12 | 187 | 146.8 |  | 4 | 8.98 | 7.05 | 610 | ±6.10 | 8 | 151 | 118.8 |  | 5 | 11.07 | 8.69 | 10 | 189 | 148.0 |  | 88.5 
 
 (88.9) 
 | ±0.90 | 3 | 8.06 | 6.33 | 12.5 | 235 | 184.2 |  | 4 | 10.62 | 8.34 | 16 | 299 | 234.4 |  | 5 | 13.12 | 10.3 | 
 
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